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Finding the Fourth Proportional to 75,123.40, 112,466.40 and 72,936.40

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Solution

The fourth proportional to 75,123.40, 112,466.40 and 72,936.40 is: 109,192.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,123.40 : 112,466.40 = 72,936.40 : x
  2. Step 2: Convert to fraction form
    75,123.40/112,466.40 = 72,936.40/x
  3. Step 3: Cross multiply
    75,123.40x = 112,466.40 × 72,936.40
  4. Step 4: Simplify right side
    75,123.40x = 8,202,894,336.96
  5. Step 5: Solve for x
    x = 8,202,894,336.96/75,123.40
  6. Step 6: Final answer
    x = 109,192.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.